Combined fire and burglar alarm.



PATBNTED APR: 16, 1907.

l A. M. BENNETT. GOMBINBD-FIRB-AND B-URGLAR ALARM.

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APPLICATION FILED APB.. 18. 1906.

JNVENTOR TTORNE Ys,

PATENTED APR. 16, 1907.

Nor 850,287.

A M. BENNETT. COMBINED FIRE AND BURG'LAR ALARM.

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APPLICATION FILED APBJB. 1906.

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' ically sounding an alarm in case of fire UNITED sTATEs PATENT CEEICE.

ALExANnEH M. BENNETT, or ELIiswoETH, MICHIGAN, AssIGNoE `or CNE- HALE ToCHARLES BENNETT, or ELLswoRTI-I, MICHIGAN.

COMBINED FIRE AND BUFKGLAR ALARM.

. Specification of Letters Patent.

Application led April 18, 1906. Serial No. 312,471.

Nc. 850,287. Patented April 1e, 1907.

Similar numerals of reference indicate corresponding parts in all of thefigures of the drawings.

The improved device consists of a casing or housing 5, designed to besecured to a window-frame or other suitable support 6 by g means ofscrews or similar fastening devices To all when?,y it may concern: yBeit known that I, ALEXANDER M. BEN- i NETT, a citizen of the UnitedStates, residing l at Ellsworth, in the County of Antrim and ,l State ofMichigan, have invented a new and f useful Combined Fire and BurglarAlarm, of which the followingfis a specification.

This invention relates to automatic fire 7. The casing 5 is preferablystamped from and burglar alarms for private dwellings, a single sheet ofmetal, one end of which is banks, hotels, and other buildings, and hasbent to form a pocket 8 for the reception of a for its object to providemeans for automator should an attempt be made by an unauthorl izedpersonto enter the building.

A further object of the invention is to pro` vide a combined hre andburglar alarm ar` l ranged to be set into operation on the burnpair ofContact members, while the opposite end thereof is curled or bent uponitself to form a tube or explosive-chamber 9, the opposite endsof whichpreferably project beyond the adjacent walls of the pocket 8, as shown.

Seated in the pocket 8 is a block of wood or other insulating material10, having a longitudinal recess or opening 11 formed therein, defininga pair of spring contact-arms 12 and 13, the free ends of which arebifurcated, as

ing of a fuse or by the displacement of a wire or other ilexible mediumoperatively connected with a circuit-breaker.

' A still further object of the invention is to provide a pair ofcontact members normally minals 15 of an energized circuit 16,includseparated or held in inoperative position by ing 4a battery 17.The wires 16 are seated in wedge or circuit-breaker, the latter beinggrooves or channels 17, formed in the longim connected to the closure ofan ex losivetudinal edges of the contact-arms, and are chamber, so thatthe burning of the use will provided with terminal loops which engageexplode the contents of the chamber, and suitable blocks 18, extendingthereby actuate the circuit-breaker to effect y across the bifurcatedends of. the sounding of the alarm. l arms, as shown.

With these and other objects in view theV l Arranged within theexplosive-chamber 9 invention consists in the construction and is anexplosive charge, preferably in the form novel combination andarrangement of parts of a cap or cartridge 19, and connected withhereinafter fully described, and illustrated in the cap 19 is a fuse 20,which extends to difthe accompanying drawings, it being under ferentportions ofthe building, so that in case stood that various-changes inform, proporof fire the fuse will be ignited, and thus extions, andminor details of construction may -plode the cap or cartridge. The freeend of be resorted to within the scope of the ap the fuse 20 is providedwith a torch 21, capapended claims. ble of being readily ignited in caseof fire in In the accompanying drawings, forming a any portion of theroom, and as many of part of this specification, Figure 1 is a perthesetorches may be suspended from and spective view of the interior portionof a connected with the fuse as are found necesbuilding supplied withthe improved autosary. Detachably secured to one end of the matic iireand burglar alarm. Fig. 2 is a lonchamber or tube 9 is a cap or closure22, congitudinal sectional view of the casing or nected, through themedium ofacord, chain, housing, the detachable closure andcircuitorother ilexible connection 23, with a wedge breaker being also shown.Fig. 3 is a transor circuit-breaker 24,' the latter being adaptversesectional view taken on the line 3 3 of ed to be interposed. between thefree ends of F ig. 2. Fig. 4 is a detail perspective view of thecontact-arms 12 and. 13, so as to normally one of the contact-arms. Fig.5 is a side eleseparate the arms, and thus interrupt the cirvationshowing the device usedk as a burglarcuit. alarm. Fig. 6 is adiagrammatical view The operation of the device is as follows:illustrating a modified' form of the invention. Should the woodwork orother portion of the transversely the contactindicated at 14, for thereception of the terroom catch on iire, the fusel20 will be ignited andin turn ignite the cap or cartridge 19, thereby causing the latter toexplode and detach the closure 22. As the closure 22 is forcibly removedunder the impulse of the explosive charge the wedge or circuit-breaker27 is simultaneously withdrawn from between contact-arms 12 and 13, thusclosing the circuit through the battery and sounding the alarm 25, so asto notify the inmates of the building of impending danger. ln somecases, in addition to notifying the inmates of the building of the iire,it is also desirable to notify the fire department or central, so thatthe iire may be extinguished with the least possible delay, and in Fig.6 of the drawings there is illustrated means whereby this result may beaccomplished. In this form of the device the terminals of the localcircuit are connectedfto a relay 26 at the central ofiice, said relaybeing adapted to actuate the armature 27 to close the signal-circuit 28,and thus simultaneously sound the alarm at central. 1n Fig. 5 of thedrawings the device is shown used as a burglaralarm. In this form of thedevice a cord, chain, wire, or other flexible medium 29 is connected tothe wedge or circuit-breaker 24 and the opposite end thereof extendedacross the windows and doors of the building,l so that if an attempt ismade by an unauthorized person to enter the building the wire 29 will beactuated to withdraw the circuit-breaker, and thus sound the alarm. Thewire 29 may extend to different portions of the room and may beconnected with a cash-drawer, trunk, and various articles of furniture,so that the occupants of the building may at once be notified should anattempt be made to burglarize the building.

From the foregoing description it is thought that the construction andoperation of the device may be readily understood by those skilled inthe art, and further description thereof is deemed unnecessary.

Having thus described the invention, what is claimed isa 1. In acombined iire and burglar alarm, a plurality of contacts, an energizedcircuit connected to the contacts and including an alarm, a chamber, aclosure for one end of the chamber, a circuit-breaker interposed betweenthe contacts for normally holding the same separated and operativelyconnected with the closure, said circuit-breaker being movable-toinoperative position to sound the alarm when the closure is removed.

2. In a combined fire and burglar alarm, a plurality of contacts, anenergized circuit connected to the contacts and including an alarm, achamber, an explosive charge arranged within the chamber, a fusecommunicating with the explosive charge, a closure for the chamber, acircuit-breaker interposed between the contacts and operativelyconnected with the closure, said circuit-breaker being movable toinoperative position to sound the alarm under the impulse of theexplosive charge.

3. In a combined iire and burglar alarm, a casing, a pair of contacts,an energized circuit connected to the contacts and including an alarm, achamber, an explosive charge disposed within the chamber, a fusecommunicating with the explosive charge and provided with a torch, aclosure for the explosive-chamber, a circuit-breaker interposed betweenthe contacts, and a connection between the circuit-breaker and closure,said circuit-breaker being movable to inoperative position under theimpulse of the explosive charge. i

4. In a combined 'lire and burglar alarm, a casing having one endthereof provided with a chamber and its opposite end formed with apocket, a pair of contact members seated in the pocket, an energizedcircuit connected to the contacts and including an alarm, an explosivecharge disposed within the chamber, a closure for said chamber, and acircuitbreaker interposed between the contacts and operatively connectedwith the closure, said circuit-breaker being moved to inoperativeposition to sound the alarm under the inipulse of the explosive charge.

5. In a combined fire and burglar alarm, a pair of contact-arms havingtheir ends bifurcated, an energized circuit the terminals of which areextended to form loops seated in the bifurcated ends of thecontact-arms, strips interposed between the loops and the adjacent facesof said arms, an alarm included in the circuit, and a circuit-breakerVinterposed between the contact-arms and movable to inoperative positionto sound the alarm.

6. In a combined fire and burglar alarm, a pair of contact-arms havingtheir ends bifurcated and their opposite longitudinal edges formed withgrooves, an energized circuit the terminals of which are seated in saidgrooves and provided with terminal loops engaging the bifurcated ends ofthe contactarms, strips interposed between the loops and the adjacentfaces of said contact-arms, an alarm included in the circuit, acircuitbreaker interposed between the contactarms, vand a iiexibleconnection secured to the circuit-breaker for withdrawing the same fromengagement with the contact-arms thereby to actuate the alarm.

7. ln a combined lire and burglar alarm, a casing having one end thereofbent to form a pocket and its opposite end curved laterally to produce atube the opposite ends of which extend. beyond the adjacent walls of thepocket to form a chamber, a pair of spring- IOO IIO

contacts seated n the pocket, an energized l In testimony that I claimthe foregoing as circuit connected to the contacts and in my own I havehereto a'lhxed my signature oludng an alarm, an explosive Charge dsnthepresenee of two Witnesses.

posed Within the chamber, a closure for one r ALEXANDER M. BENNETT.

end of the tube, a circuit-breaker interposed TWitnesses: between thecontacts, and a flexible connec- CHAS. KINNER, tion between theercut-breaker and closure. ISABEL U. HARRIS.

